Low temperature sulphur dioxide oxidation catalyst for sulfuric acid manufacture
US8758718B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Oct 29, 2010 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Oct 29, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2235/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Improved catalysts for oxidation of sulfur dioxide which are alkali metal-promoted vanadium catalysts which are further promoted by gold. Improved methods employing such catalyst for oxidation of sulfur dioxide and for manufacture of sulfuric acid. Improved methods for multiple step oxidation of sulfur dioxide in which the last oxidation step is carried out employing improved catalysts of this invention at temperatures lower than 400° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.